(As experienced, oh, no less than two minutes ago.)

Briefly consider diving under your computer desk. Change your mind immediately when you envision your bosses boss, walking by your cubicle and seeing your sorry programmer ass curled up fetal position next to a bunch of computer wires.
Stand up and peer over the field of cubicles, to see if everyone else felt the earthquake. Well duh, of course everyone felt the earthquake, it’s an earthquake for godssakes. So thirty or forty people are standing straight up in their cubicles, half of them on their cellphones and we feel like a bunch of wild gophers on a National Geographic special.
Once you realize that the earthquake wasn’t seriously and nothing is broken or no one is dead, earthquakes make for the best coffee breaks. No, seriously — when 98% of your co-workers are nearly twice your age and have 1.5 children, you don’t really have much to relate to. But an Earthquake? Hell, you just went through one three minutes ago! It’s a chance to bond with your fellow office-dwellers, until lunchtime comes around and avoiding eye contact will become inevitable, I guess.

We’re going to war, we just had our 100th homicide and if we’re lucky, the ground will open up and swallow us all. It’s a good news day.